The Dyeing of Cyanoethylated Cotton

The mechanism of cyanoethylation of cotton is discussed, and it is shown that for best effi ciency the pick-up of sodium hydroxide must not exceed 15% of the weight of the cotton. Measurements of physical properties show that any increases in the breaking strength or elon gation of yarns are results of changes in frictional forces. The physical properties of cyano ethylated fabrics reflect the properties of the yarn and are also dependent on fabric construction. Extremely high resistance to flat abrasion is obtained with high cyanoethyl substitution. The density of cyanoethylated cotton is shown to be linearly related to the nitrogen content, and the spread of values obtained has been found to give an estimate of the uniformity of treatment. Cyanoethylated cotton can be dyed by methods developed for polyacrylonitrile fibers such as those employing acid dyes in the presence of cuprous ion, and the dyed samples so produced are suitable for cross sectioning for microscopic examination. The intensity of dye color can be used as a measure of the amount of cyanoethylation.

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A Progress Report on Cyanoethylated Cotton

Grant

Greathouse

Reid

et al. 1955

Textile Research Journal

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Effect of Alkaline Hydrolysis on the Properties of Cyanoethylated Cotton

Mazzeno

Reinhardt

Reid

et al. 1956

Textile Research Journal

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Cyanoethylated cotton has been subjected to treatment with excess 1% aqueous sodium hydroxide at temperatures of 22°, 60°, and 97° C. Rates of cleavage of cyanoethyl groups at these temperatures have been determined. Resistance to rotting is destroyed by re moval of part of the cyanoethyl groups. Heat resistance is decreased by the alkaline treatment, but only to the extent that nitrogen is removed. It appears that heat resistance is directly proportional to the nitrogen content regardless of the previous history of the sample. Dyeing characteristics, measured by a differential staining technique, show reversion to the color of untreated cotton even though only half the nitrogen is removed. Physical properties are not adversely affected by alkaline hydrolysis. Tenacity in creases as groups are cleaved but does not return to the original value of the gray yarn. This is the usual case with other cellulose derivatives. The knot strength data do not indicate brittleness. Hydrolysis has little effect on elongation.

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The Influence of Micronaire Fineness and Prior Treatments on the Cyanoethylation of Cotton

Reinhardt

Tallant

1957

Textile Research Journal

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The Dyeing of Cyanoethylated Cotton

Cited by 4 publications

References 3 publications

A Progress Report on Cyanoethylated Cotton

A Progress Report on Cyanoethylated Cotton

Effect of Alkaline Hydrolysis on the Properties of Cyanoethylated Cotton

The Influence of Micronaire Fineness and Prior Treatments on the Cyanoethylation of Cotton

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